In last week's tag-up it was made clear that a capability is needed to
display a table with data from multiple schools/sites. One way this
could be offered is by providing a capability to print a table of the
values that go into a graph. At present we allow the choice of up to 4
data layers and they can be different types of data from a site or data
from different sites and even data of different types from different
sites.

The tool in the old system allowed up to 6 columns with an arbitrary
user choice of which school and which data type. Remind me why we
limited our graphs to 4. My memory was that performance was the issue.

There are some data types/layers where no graph is provided; we will
need to check a list of which these are to see if multi school tables of
these data are truly needed. For instance, we don't graph soil
characterization data as generally the measurements are made only once
for a site and for the same reason one can get data adequately for
multiple schools by displaying tables of data for each school - there is
no need to align these data to common dates.